The part you are refering to is an emissions pump. I have it and it works fine for me. I have no oil leaks or dipsticks blowing out. I did have a breather on the valve cover, but my blow by was bad enough that I had small oil droplets being pushed out. Now, its great, a clean engine again. The pump comes with 5/8" hose fittings. I didn't want to hack up my "go fast" chrome valve covers , so I drilled and tapped an old oil fill cap with a 3/4 MPT with a 90 deg end and a 5/8" hose on the other. Works great. Cost is about $180-120 depending on the dealer. I bought mine used for 70. Hope this helps.
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old S trim combo 10.13@ 135
New YS combo = 680RWHP (no times)
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